六氟砷酸五氟苯基氙(II)[C 6 F 5 Xe] + [AsF 6 ] -(MeCN,20°C)与芳族化合物C 6 H 5 X(X = CH 3,F,CF 3,NO 2和CN)反应,得到多氟联苯XC 6 H 4 C 6 F 5的异构体混合物。当X = 1时,另外形成碘五氟苯,而三甲基甲硅烷基苯(X = SiMe 3)仅转化为C 6 H 5 C 6 F 5和C。6个˚F 5 H.这些结果与用于与氟化氙相应的芳族化合物的基团和pentafluorophenylation氟化反应的数据相比较2。在以下条件下,多氟芳族化合物C 6 F 6,C 6 F 5 H,C 6 F 5 I,C 6 F 5 CN和C 6 F 5 SiMe 3不与[C 6 F 5 Xe] + [AsF 6 ] -反应。相同的条件。
HandaPhos: A General Ligand Enabling Sustainable ppm Levels of Palladium-Catalyzed Cross-Couplings in Water at Room Temperature
作者:Sachin Handa、Martin P. Andersson、Fabrice Gallou、John Reilly、Bruce H. Lipshutz
DOI:10.1002/anie.201510570
日期:2016.4.11
complexed in a 1:1 ratio with Pd(OAc)2, enables Pd‐catalyzed cross‐couplings to be run using ≤1000 ppm of this pre‐catalyst. Applications to Suzuki–Miyaura reactions involving highly funtionalized reaction partners are demonstrated, all run using environmentally benign nanoreactors in water at ambient temperatures. Comparisons with existing state‐of‐the‐art ligands and catalysts are discussed herein.
Pd-Catalyzed Decarboxylative Cross Coupling of Potassium Polyfluorobenzoates with Aryl Bromides, Chlorides, and Triflates
作者:Rui Shang、Qing Xu、Yuan-Ye Jiang、Yan Wang、Lei Liu
DOI:10.1021/ol100008q
日期:2010.3.5
Pd-catalyzed decarboxylative cross coupling of potassiumpolyfluorobenzoates with arylbromides, chlorides, and triflates is achieved by using diglyme as the solvent. The reaction is useful for synthesis of polyfluorobiaryls from readily accessible and nonvolatile polyfluorobenzoate salts. Unlike the Cu-catalyzed decarboxylation cross coupling where oxidative addition is the rate-limiting step, in
Sustainable Fe–ppm Pd nanoparticle catalysis of Suzuki-Miyaura cross-couplings in water
作者:Sachin Handa、Ye Wang、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1126/science.aac6936
日期:2015.9.4
1087 An iron preparation substantially lowers the quantity of palladium needed to catalyze a common reaction that forms C-C bonds. Most of today’s use of transition metal–catalyzed cross-coupling chemistry relies on expensive quantities of palladium (Pd). Here we report that nanoparticles formed from inexpensive FeCl3 that naturally contains parts-per-million (ppm) levels of Pd can catalyze Suzuki-Miyaura
A General Direct Arylation of Polyfluoroarenes with Heteroaryl and Aryl Chlorides Catalyzed by Palladium Indolylphosphine Complexes
作者:On Ying Yuen、Mueangkaew Charoensak、Chau Ming So、Chutima Kuhakarn、Fuk Yee Kwong
DOI:10.1002/asia.201500048
日期:2015.4
The first general examples of direct coupling of heteroaryl chlorides, especially substituted 2‐pyridyl chlorides which were previously found to be problematic, with electron‐deficient polyfluoroarenes are reported. Pd(OAc)2 associated with 3‐(dicyclohexylphosphino)‐2‐phenylindole L1 serves as the effective catalyst which allows the challenging direct coupling of heteroaryl chlorides and polyfluoroarenes
The effect of N-heterocyclic carbene ligands in the palladium-catalyzed cross-coupling reaction of K[C6F5BF3] with aryl iodides and aryl bromides
作者:Nicolay Yu. Adonin、Dmitrii E. Babushkin、Valentin N. Parmon、Vadim V. Bardin、Gennadiy A. Kostin、Vasiliy I. Mashukov、Hermann-Josef Frohn
DOI:10.1016/j.tet.2008.04.043
日期:2008.6
The effect of N-heterocycliccarbene (NHC) ligands on the catalyticactivity of in situ generated palladiumcomplexes in the model cross-couplingreaction of K[C6F5BF3] with 4-FC6H4I was studied. Based on the obtained results, a series of pentafluorobiphenyls C6F5C6H4X were prepared from K[C6F5BF3] and XC6H4I or 4-CF3C6H4Br in high yields under aerobic conditions.
在K [C 6 F 5 BF 3 ]与4-FC 6 H 4 I的模型交叉偶联反应中,研究了N-杂环卡宾(NHC)配体对原位生成的钯配合物催化活性的影响。根据获得的结果,以高收率从K [C 6 F 5 BF 3 ]和XC 6 H 4 I或4-CF 3 C 6 H 4 Br制备了一系列五氟联苯C 6 F 5 C 6 H 4 X在有氧条件下。